Year	% of GDP
1970	0.5515375246657768
1971	0.3836601947687697
1972	0.8824089613027002
1973	1.6226456837174492
1974	16.56595305589154
1975	11.128949566583914
1976	10.680863859940281
1977	12.600494017875238
1978	9.802822612810004
1979	25.478767033242995
1980	14.726401471284035
1981	3.3026165288504297
1982	1.3304448172279137
1983	3.509629083325772
1984	5.360112587305076
1985	6.465150533922347
1986	2.4622335415896996
1987	4.769070946017302
1988	3.901373812284938
1989	8.77749276470424
1990	10.354144885681986
1991	6.446600866335818
1992	7.227475199084971
1993	11.378212804571774
1994	9.263837280214494
1995	9.827308900693959
1996	10.891683775288165
1997	9.72072152052312
1998	4.88840673607042
1999	4.351302140327208
2000	8.613657717949252
2001	6.236515616848653
2002	5.411987217401477
2003	5.569331716642542
2004	6.971755688886815
2005	9.416656186683719
2006	8.793002493873374
2007	8.185859622782584
2008	9.600983029769436
2009	5.0075290495432485
2010	7.262683324456097
2011	9.227615298311544
2012	7.861174807020527
2013	6.164329222763624
2014	4.616442353412299
2015	1.7287957561103113
2016	1.4528623543317123
2017	2.737393521401667
2018	3.9889298063289904
2019	3.6367679010963663
2020	1.8192152960326367
2021	3.288840038922343